本文介绍了如何在chrome下用webrtc来实现桌面共。因为必要要用https来访问才行,因此也顺带介绍了如何使用SSL证书。
1 chrome扩展程序
https://github.com/otalk/getScreenMedia/tree/master/chrome-extension-sample
或 http://yunpan.cn/cHfwnrZcG2hsH 访问密码 1cf9
- 打开 manifest.json 文件,修改下面的内容:
"content_scripts": [ {
"js": [ "content.js" ],
"matches": [ "
https://localhost:*/*" ]
}],
打开chrome,输入chrome://extensions/ 以打开chrome的扩展程序,按下图的顺序加载:
2 共享桌面
共享桌面方法:
webrtc.shareScreen()
停止共享桌面方法:
webrtc.stopScreenShare()
//// 桌面共享 var button = document.getElementById('screenShareButton'), setButton = function (bool) { //button.innerText = bool ? 'share screen' : 'stop sharing'; $('#screenShareButton').attr('value', bool ? 'Share Screen' : 'Stop Sharing'); }; setButton(true); function screenShare() { if (webrtc.getLocalScreen()) { webrtc.stopScreenShare(); setButton(true); } else { webrtc.shareScreen(function (err) { if (err) { setButton(true); } else { setButton(false); } }); } }
.
3 本机显示共享的内容
本机显示:
// local screen obtained webrtc.on('localScreenAdded', function (video) { //video.onclick = function () { // video.style.width = video.videoWidth + 'px'; // video.style.height = video.videoHeight + 'px'; //}; video.className = 'localVideo'; document.getElementById('localScreenContainer').appendChild(video); $('#localScreenContainer').show(); });
个人觉得本机没必要,在点击时放大共享的内容,所以把上面click事件注释掉了。
移除显示:
// local screen removed webrtc.on('localScreenRemoved', function (video) { document.getElementById('localScreenContainer').removeChild(video); $('#localScreenContainer').hide(); });
.
4 接收桌面共享
接收桌面共享:
// a peer video has been added webrtc.on('videoAdded', function (video, peer) { console.log('video added', peer); var remotes = document.getElementById('remotes'); if (remotes) { var container = document.createElement('div'); //container.className = 'videoContainer'; container.id = 'container_' + webrtc.getDomId(peer); container.appendChild(video); // suppress contextmenu video.oncontextmenu = function () { return false; }; video.className = 'remoteVideos'; // resize the video on click video.onclick = function () { launchFullscreen(video); }; // show the ice connection state if (peer && peer.pc) { var connstate = document.createElement('div'); connstate.className = 'connectionstate'; container.appendChild(connstate); peer.pc.on('iceConnectionStateChange', function (event) { switch (peer.pc.iceConnectionState) { case 'checking': //connstate.innerText = 'Connecting to peer...'; break; case 'connected': case 'completed': // on caller side //$(vol).show(); //connstate.innerText = 'Connection established.'; break; case 'disconnected': //connstate.innerText = 'Disconnected.'; break; case 'failed': //connstate.innerText = 'Connection failed.'; break; case 'closed': //connstate.innerText = 'Connection closed.'; break; } }); } remotes.appendChild(container); } });
其中remotes是一个div,用于放共享桌面和对方视频;当点击小共享桌面图时,最大化:
function launchFullscreen(element) {
if (element.requestFullscreen) {
element.requestFullscreen();
} else if (element.mozRequestFullScreen) {
element.mozRequestFullScreen();
} else if (element.msRequestFullscreen) {
element.msRequestFullscreen();
} else if (element.webkitRequestFullscreen) {
element.webkitRequestFullScreen();
}
}
同样地,当对方停止共享时,要移除显示:
// a peer was removed webrtc.on('videoRemoved', function (video, peer) { console.log('video removed ', peer); var remotes = document.getElementById('remotes'); var el = document.getElementById(peer ? 'container_' + webrtc.getDomId(peer) : 'localScreenContainer'); if (remotes && el) { remotes.removeChild(el); } });
5 调试
选中web项目,按F4打开属性面板:
修改SSL Enabled为 True,然后它会自己为你的项目生成一个SSL URL,这时你就可以用https来测试桌面共享了:
点击共享按钮,弹出共享对话框,这可以选择共享整个屏幕还是单个程序:
选中一个共享内容,本机local video 下显示了一个小图:
再看对方,remote video下 也显示了一个小图:
点击这个remote的小图,即可全屏显示对方的桌面共享:
6 发布
6.1 修改 manifest.json 文件,把localhsot修改成服务器上的域名
"content_scripts": [ {
"js": [ "content.js" ],
"matches": [
https://www.gwjg.com:*/* ]
}],
6.2 添加SSL证书
因为必须使用https, 一打开就会显示下面的红叉叉:
装了证书后,就会显示正常:
申请SSL证书:
https://buy.wosign.com/free/freessl.html?lan=cn#ssl
在上面网站申请成功并下载证书。解压并把 ‘for iis’目录下的pfx文件复制到服务器上。
打开iis里的服务器证书:
导入证书:
把网站绑定上证书:
一步一步搭建客服系统
.